4.Find the perimeter of the triangle with the vertices at
(2, 1), (-4, 5), and (-5, -2).

5.Consider the two points (1,-1) and (7,6). The distance between them is:__
The x co-ordinate of the midpoint of the line segment that joins them is:___
The y co-ordinate of the midpoint of the line segment that joins them is: ___

6.Two ships leave a harbor at the same time, traveling on courses that have an angle of 130degrees between them. If the first ship travels at 22 miles per hour and the second ship travels at 28 miles per hour, how far apart are the two ships after 2.9 hours?

March 11th 2007, 03:27 PM

ThePerfectHacker

Quote:

Originally Posted by badandy328

4.Find the perimeter of the triangle with the vertices at
(2, 1), (-4, 5), and (-5, -2).

Let A(2,1) B(-4,5) C(-5,-2).

Find,
distance(A,B)=X

Find,
distance(A,C)=Y

Find,
distance(B,C)=Z

The answer is,
X+Y+Z

Quote:

5.Consider the two points (1,-1) and (7,6). The distance between them is:__
The x co-ordinate of the midpoint of the line segment that joins them is:___
The y co-ordinate of the midpoint of the line segment that joins them is: ___

sqrt((1-7)^2+(-1-6)^2}=sqrt(36+49)=sqrt(85)

The midpoint is,
(4,2.5)

March 11th 2007, 03:35 PM

badandy328

Quote:

Originally Posted by ThePerfectHacker

Let A(2,1) B(-4,5) C(-5,-2).

Find,
distance(A,B)=X

Find,
distance(A,C)=Y

Find,
distance(B,C)=Z

The answer is,
X+Y+Z

sqrt((1-7)^2+(-1-6)^2}=sqrt(36+49)=sqrt(85)

The midpoint is,
(4,2.5)

Thanks for the first one but the 5th one I don't get what the aswers are.